Governor



B. E. CEDERSTROM.

GOVERNOR.

APPLICATION FILED MAY 3. 1915.

2 $HEETSSHEET I.

Patented Jul 16 15, 1920.

B. E. CEDERSTROM.

GOVERNOR.

APPLICATION FILED MAY. s, 1915.

1,343,389. Patented June15, 1920.

2 SHEETS-SHEET 2..

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Specification of Letterslatent. v

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Application filed May 3, 1915. Serial No. 25357.

To all whom it may concern: l

Be it known that I, Bron CEDERSTROM, a citizen of the United States,"residing at Detroit, county of Wayne,-: and State, of Michigan, have invented certain new and useful Improvements-in Governors, of which the following is a full, clear, and exact description. 1 w This invention relates to. governors and more specifically to. tension regulating devices and hasfor an object ,toprovide ado;

vice for automatically maintaining .a- ,prede? termined tension in ;a-.traveling web from 12 is rotatably mounted onthe bracket, the

stub-shaft havingan angularIsocket in. one end to receive the spindle 13 upon which the stock roll 14 of fabric. or othermaterial is spooled. The web of material passes from the stock roll 14 underneathguide rollers 15 and 16 carried by the bracket 11'and over an intermediate guide roll yieldably held a tension device hereinafter descr bed, and from the guide roller 16, passes .to the point where it is to be used, as for example, to the rolls of a calender for treating the web with a plastic, or to a ring core in case the web consists of rubber-treated fabric which is-heing used to build a tire. In either case the web is drawn positively from the stock roll by the apparatus operating upon or "using the material, thereby rotating the stock roll 14, spindle 13 and shaft 12 as a unit." g

For retarding rotation of the stock roll and thereby tensioning the web, a friction brake is mounted on the shaft 12. The brake comprises a casing 18 which has a stationary disk wall-19, against which a friction disk 20 is automatically pressed at times, as will be presently explalned, there being a spring 20 which acts on the fric- 'the actionof its spring 20'.

ti on disk against said automatically applied pressure and serves torelease the brake after each application.- 1The-xfriction disk. is

formed in sections} to. facilitate assembling,

all of the sections, being. feathered upon-"the shaft 12 and being movable as a unit thereon toward andawayLfrOm the.wall -19.-. F2 2;;

For applyi thefriction brake, a cylin der- 21' is mounted: on the casing 18 ands-is partially filled with liquidsuch as oil.: Gompressed :a1r,;or other medium under pressure, is let into the cylinder and acting through the. oil, causes the latter ,to exertpressure through a port 23;:in, the cylinderv against a piston 23 directly on therear side-. ofathe brake disk, thereby moving the latter intov frictional engagementqwithi the wall 19. .mThe

admission and release of the "air: is r. ef fected through a valve chest 24 within which is rotatably mountedsa valve 25 that is held in its seat by a spring 30.

- .7 The valve 25-is formed :with a'port. 28' which during-rotation of; the valve; in one; die. IG CtIOH-I'COIHBS into registration with a port 31 .formed in the, top of the icylinderand admits, compressed airhfrom a pipe 32. to the cylinder on top .of the. oil. Also formedin vthe valve: isra passage 33 which upon,

rotation of the valve'in theothendirection;

establishes communication between the port 31'and anexhaust port 34 whereby the compressed air is allowed to. esca-pe from the cylinder. .--,-This admission and release of the air pressure from on topzofthe oil cor-.

respondingly applies the friction brake or permits of 'releaseof the friction brake by For automatically operatmg when provide a bell crank-lever '26, one leg vof which is connectedlto the valveby means of a connecting rod 27 and a crank 28 on the valve stem. The other leg of the lever isconnected to a helical. spring 36 which is connected to the above mentioned roller :17 by a link mechanism 35 and yieldably holds said roller at its upper limit of movement.

An indicator 40 is operatively interpolatedbetween the spring and the link mechanism cylinder and the compressed air will be acting through the oil to hold the brake set and the stock roll 14 stationary. During initial 'feed of the web, the roller 17 will be drawn downwardly against the pull. of the spring 36, with a resultant movement of the bell crank lever 26, connecting rod 27 and crank 28, until at a predetermined point in this movement (at which point the necessary or predetermined degree of tension will exist in the web), the port 28 in the valve will pass out of registry with the port 31, thereby upon the air is again admitted to the cylirider and the brake set until the desired tension is restored in the web.

For adjusting the parts to properly time the valve, so that any desired degree of tension may be maintained in the fabric, I provide an adjusting nut 37, which is threaded onto an eyebolt 38 to which the spring "36 is attached, and bears against the bracket 39 of the eyebolt, as shown.

Having described my invention, what I claim and desire to protect by Letters-Patent is 1. In adevice of the character described, a pair of brake-members, one of said members being fixed and the other of said members being mounted for rotation with a shaft to be controlled and also movable relatively thereto, resilient means normally tending to hold said members spaced apart, a chamber containing liquid, a piston in engagement with said movable member and actuated by said liquid, and means to apply pressure to said liquid to therebv move the rotatable brake-member into frictional engagement Withthe stationary brake-member. 2. In a governor, a shaft, 9. fixed brake member, a brake disk mounted to turn with said pressure fluid to the liquid containing chamber or for opening an exhaustpassage from said chamber. 7

3. In a governor, a shaft, a brake disk mounted to turn with said shaft and slidable thereon, a fixed brake member on one side of said brake disk, a liquid containing cham- .ber on the other side thereof, means utiliz- 1ng gaseous fluid for exerting pressure on said liquid to apply the brake disk to the brake member, and resilient means for returning the brake disk to inoperative po sition.

' Signed at Detroit, Mich, April 27th 1915.

BROR E. CEDERSTROM. 

